ES2878576T3 - Dynamic probing reference signal planning - Google Patents

Abstract

A method of wireless communication, comprising: receiving (2305), at a user equipment, UE, a polling reference signal, SRS, grant message from a base station, the SRS grant message comprising an indication of SRS parameters including a timing component and a repetition parameter associated with one or more SRS transmissions, wherein the timing component is associated with a physical uplink transmission; and transmitting (2310), to the base station, the one or more SRS transmissions in accordance with the SRS grant message.

Description

DESCRIPTION

Dynamic probing reference signal planning

Background

The following refers generally to wireless communication, and more specifically to dynamic sounding reference signal scheduling.

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and time division multiple access systems. Orthogonal Frequency Division (OFDMA). A multiple access wireless communication system may include a number of base stations, each of which simultaneously supports communication for multiple communication devices, each of which may be referred to as a user equipment (UE). Some wireless communication systems can operate in millimeter wave (mmW) frequency ranges, for example, 28 GHz, 40 GHz, 60 GHz, etc. Wireless communication on these frequencies can be associated with increased signal attenuation (eg path loss), which can be influenced by various factors, such as temperature, barometric pressure, diffraction, etc. As a result, signal processing techniques, such as beamforming, can be used to consistently combine energy and overcome path losses at these frequencies. Due to the increased amount of path loss in mmW communication systems, transmissions from the UE can be beamforming. Therefore, the uplink control channels can be received at a base station in a directional manner from multiple UEs.

Communications between a UE and a base station may include the use of polling reference signals (SRS). In some cases, an SRS can be used for wireless channel estimation. Channel estimates can be used to demodulate and decode subsequent data portions that follow the SRS. It may be desirable to adjust SRS parameters for SRS transmissions based on conditions in a communications environment and / or changes in the necessary planning of UEs (eg, a changing number of UEs to be served by a base station). However, the SRS transmission parameters can be preconfigured by an upper layer (eg, a radio resource control (RRC) layer). Setting SRS transmission parameters in higher layers can result in costly SRS parameter setting. Documents 3GPP R1-102110, US 2013/078913 A1, 3GPP R1-105439, 3GPP R1-111150, 3GPP R1-081332, 3GPP R1-105543, WO 2013/109049 A1 and US 2011/142095 A1 describe SRS estimation methods .

Summary

The invention is set forth in the appended set of claims.

Figure 1 illustrates an example of a wireless communication system that supports dynamic probe reference signal scheduling in accordance with aspects of the present disclosure;

Figure 2 illustrates an example of a wireless communication system that supports dynamic probe reference signal scheduling in accordance with aspects of the present disclosure;

Figure 3 illustrates an example of a dynamic probe reference signal configuration that supports dynamic probe reference signal scheduling in accordance with aspects of the present disclosure;

Figure 4 illustrates an example of a dynamic probe reference signal configuration that supports dynamic probe reference signal scheduling in accordance with aspects of the present disclosure;

Figure 5 illustrates an example of a process flow in a system that supports dynamic probing reference signal scheduling in accordance with aspects of the present disclosure;

Figures 18, 21 and 22 illustrate examples of process flows in a system that supports dynamic probing reference signal scheduling in accordance with aspects of the present disclosure;

Figures 6 to 8 show block diagrams of a wireless device supporting dynamic probing reference signal scheduling in accordance with aspects of the present disclosure;

Figure 9 illustrates a block diagram of a system that includes a base station that supports dynamic probe reference signal scheduling in accordance with aspects of the present disclosure;

Figures 10-11 illustrate methods for dynamic sounding reference signal planning in accordance with aspects of the present disclosure;

Figures 12-14 show block diagrams of a wireless device supporting claims in accordance with aspects of the present disclosure;

Figure 15 illustrates a block diagram of a system that includes a UE supporting claims in accordance with aspects of the present disclosure; Y

Figures 16, 17, 19, 20, 23 and 24 illustrate methods for claims in accordance with aspects of the present disclosure.

Detailed description

Communications between a user equipment (UE) and a base station may include the use of polling reference signals (SRS). It may be desirable to adjust SRS parameters for SRS transmissions based on conditions in a communications environment and / or changes in the necessary planning of UEs (eg, a changing number of UEs to be served by a base station). Dynamically configuring parameters for SRS transmission at the physical layer (PHY) can result in increased planning flexibility. An SRS indication can be dynamically signaled over a physical downlink control channel (PDCCH).

The SRS indication can include an SRS trigger and, in some cases, SRS parameters that are dynamically configured by the base station. The SRS indication may include more than one bit (eg, N bits) to indicate SRS parameters, or to indicate where the SRS parameters are located. That is, the SRS trigger and SRS parameters can all be included in downlink control information (DCI) on the PDCCH or alternatively the SRS trigger and an indication of where to find the SRS parameters (for example , where outside the PDCCH) can be sent on the PDCCH. SRS parameters can include SRS periodicity, subframe index, start position, allocated resources (for example, occupied bandwidth), cyclic offset, comb index, number of symbols, sub-clusters (for example, beams of a scenario beamforming), etc. The SRS parameters can be determined by a base station based on UE feedback or environmental conditions observed at the base station.

Aspects of the disclosure are initially described in the context of a wireless communication system. Examples of dynamic SRS configurations and methods for implementing dynamic SRS configurations are described below. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to dynamic sounding reference signal planning.

Figure 1 illustrates an example of a wireless communication system 100 in accordance with various aspects of the present disclosure. Wireless communication system 100 includes base stations 105, UE 115, and core network 130. In some examples, wireless communication system 100 may be a Long-Term Evolution (LTE) / Advanced LTE (LTE-A) network. ).

In some cases, an SRS can be used for wireless channel estimation. Channel estimates can be used to demodulate and decode subsequent data portions that follow the SRS. Conventionally, the wireless communication system 100 may periodically or aperiodically schedule SRSs. For periodic SRS scheduling, SRS parameters can be sent via radio resource control signaling (RRC). For aperiodic scheduling, SRS timing can be triggered through a PDCCH. The SRS timing can be indicated by a single bit in the physical layer (PHY). A UE 115 can send SRS a fixed time after receiving PDCCH using SRS parameters that are preconfigured by an upper layer (eg, an upper layer).

In certain aspects, the wireless communication system 100 can support dynamic scheduling for SRS transmissions. For example, a base station 105 can dynamically schedule SRS transmissions from a UE 115 and transmit the SRS transmission parameters to UE 115 via a PDCCH, in some examples. In other examples, the base station 105 may transmit a pointer to the SRS transmission parameters on the PDCCH and then transmit the SRS transmission parameters on a PDSCH. SRS parameters can include SRS periodicity, subframe index, start position, allocated resources, cyclic offset, comb index, and so on. Base station 105 may identify or otherwise determine an SRS configuration for a UE 115, eg based on channel measurements, communication requirements (eg, Buffer Status Report (BSR) from UE 115) etc. Base station 105 can determine SRS transmission parameters for UE 115 and transmit an SRS grant message to UE 115 on the PDCCH. The SRS grant message may include the SRS transmission parameters, or at least one pointer to the location of where the UE 115 can locate the SRS transmission parameters. The UE 115 may receive the SRS grant message, determine the SRS transmission parameters, and send the SRS transmissions to the base station 105 in accordance with the SRS grant message.

Base stations 105 can communicate wirelessly with UEs 115 through one or more base station antennas. Each base station 105 may provide communication coverage for a respective geographic coverage area 110. The communication links 125 displayed in wireless communication system 100 may include uplink (UL) transmissions from a UE 115 to a base station 105, or Downlink (DL) transmissions, from a base station 105 to a UE 115. The UEs 115 can be dispersed throughout the wireless communication system 100, and each UE 115 can be stationary or mobile. A UE 115 may also be referred to as a mobile station, subscriber station, remote unit, wireless device, access terminal (AT), handset, user agent, client, or similar terminology. A UE 115 can also be a cell phone, a wireless modem, a portable device, a personal computer, a tablet, a personal electronic device, a machine type communication device (MTC), etc.

The base stations 105 can communicate with the main network 130 and with each other. For example, base stations 105 can interact with main network 130 via backhaul links 132 (eg, S1, etc.). Base stations 105 can communicate with each other via backhaul links 134 (eg, X2, etc.) either directly or indirectly (eg, via backbone 130). Base stations 105 can perform radio setup and programming for communication with UEs 115, or can operate under the control of a base station controller (not shown). In some examples, the base stations 105 can be macro cells, small cells, access zones, or the like. Base stations 105 may also be referred to as eNodeB (eNB) 105.

The SRS can be transmitted over the UE 115 using a predetermined sequence (eg, a Zadoff-Chu sequence) so that a base station 105 can estimate the UL channel quality. An SRS transmission may not be associated with a data transmission on another channel, and may be transmitted periodically on a wide bandwidth (eg, a bandwidth that includes more subcarriers than are allocated for UL data transmission). An SRS can also be scheduled on multiple antenna ports and still a single SRS transmission can be considered. An SRS transmission can be categorized as either a Type 0 SRS (transmitted periodically at equally spaced intervals) or as a Type 1 SRS (aperiodic). Therefore, the data collected by a base station 105 from an SRS can be used to inform a UL scheduler. A base station 105 may also use an SRS to check the timing alignment status and send time alignment commands to the UE 115.

In mmW systems, transmissions (for example, SRS grants, SRS transmissions, etc.) may be beamformed to meet a certain link balance (for example, a profit and loss accounting associated with transmitters and receivers when they communicate through a medium). In such cases, the base stations 105 can use multiple antenna ports connected to antenna sub-arrays to shape the beams in various directions using a number of analog weighting factors. A base station 105 can therefore transmit in multiple directions, in which the direction can change on each symbol of a subframe.

Figure 2 illustrates an example of a wireless communication system 200 for dynamic probe reference signal planning. Wireless communication system 200 may include base station 105-a and UE 115-a, which may be examples of corresponding devices described with reference to Figure 1. Wireless communication system 200 represents a system that supports SRS scheduling. dynamics in the PHY layer (for example, between PHY 215 entities).

An SRS indication may be dynamically signaled via PDCCH 220 from PHY entity 215-aa to PHY entity 215-b. The SRS indication may include an SRS trigger and, in some cases, SRS parameters that are dynamically configured by base station 105-a. In some cases, more than one symbol may be used to signal an SRS indication. SRS resources can be dynamically scheduled. Furthermore, the SRS timing in PDCCH 220 may include N number of bits. The UE 115-a can send the SRSs at 2AN potential locations after receiving an SRS trigger via PDCCH 220.

The SRS indication may include more than one bit (eg, N bits) to indicate SRS parameters, or to indicate where the SRS parameters are located. That is, the SRS trigger and the SRS parameters can all be included in downlink control information (DCI) on the PDCCH 220 or alternatively the SRS trigger and an indication of where to find the SRS parameters (for example, where outside the PDCCH) can be sent on the PDCCH. In the latter case, the SRS parameters can be sent over a downlink shared physical channel (PDSCH) 225. The indication of where the s Rs parameters are being sent may allow the UE 115-a to know where to look for the SRS parameters when decoding PDSCH 225. Greater planning flexibility can be achieved when dynamically indicated SRS parameters in the PHY layer versus the preconfiguration of SRS parameters in a higher layer. That is, SRS parameters generated in an RRC entity 205 and passed through intermediate entities 210 to PHY entities 215 can result in reduced SRS planning flexibility.

SRS parameters can include SRS periodicity, subframe index, start position, allocated resources (for example, occupied bandwidth), cyclic offset, comb index, number of symbols, sub-clusters (for example, beams of a scenario beamforming), etc. SRS parameters can be determined by base station 105-a based on UE feedback or environmental conditions at base station 105-a. For example, the allocated resources or occupied bandwidth may depend on channel quality measurements or power limitation information sent from the UE 115-a. Base station 105-a can use channel quality measurements from UE 115-a to adjust the bandwidth allocated to high-quality channels. Additionally or alternatively, the base station 105-a may receive notification that the UE 115-a has limited power, and may reduce the bandwidth so that the UE 115-a can propagate the limited power available across a smaller bandwidth. Other examples of factors for determining SRS parameters may include selecting sub-clusters or beams based on beam quality reports, physical offsets from knowledge of the number of UE 115 to serve (e.g. other UE 115 to be scheduled per SRS by the station base 105-a), comb index as a function of the chosen frequency resources used and the number of UE 115 to serve, etc. In some cases, SRS parameters can be dynamically adjusted for each SRS trigger (for example, SRS can use different resources in response to each SRS trigger).

Figure 3 illustrates an example of a dynamic SRS 300 configuration for dynamic probing reference signal scheduling. In some cases, the dynamic SRS configuration 300 may represent aspects of techniques performed by a UE 115 or a base station 105 as described with reference to Figures 1-2.

The dynamic SRS configuration 300 illustrates an example of a series of subframes configured for dynamic SRS scheduling. Subframe 1 may start with an SRS trigger 305 indicated on the PDCCH. The SRS trigger 305 may be followed by a data portion 310 transmitted over the PUSCH. In some examples, the SRS trigger 305 includes parameters for SRS transmission. Before the completion of subframe 1, an SRS 315 may be scheduled in response to the SRS 305 trigger. The SRS 315 may be scheduled in accordance with SRS transmission parameters indicated in the SRS 305 trigger.

Alternatively, subframe 2 illustrates the scenario where the beginning of a subframe includes a blank control portion 320 (eg, PDCCH without an SRS trigger). In this case, a data portion 310 can follow the blank control portion 320 and continue to the boundary of subframe 3 since no SRS 315 is needed.

Figure 4 illustrates an example of a dynamic SRS 400 configuration for dynamic probe reference signal scheduling. In some cases, the dynamic SRS configuration 400 may represent aspects of techniques performed by a UE 115 or a base station 105 as described with reference to Figures 1-2.

The dynamic SRS configuration 400 illustrates an example of a series of subframes configured for dynamic SRS scheduling. In certain aspects, the dynamic SRS configuration 400 may illustrate an example of including a timing component that is associated with s Rs transmissions, with PUSCH transmissions, with PUCCH transmissions, or combinations thereof. In some aspects, the timing component may include using a bit or bits to transmit aspects of the transmission schedules for the current subframe and, in some examples, certain of the subsequent subframes, eg, symbol locations for the respective transmissions. For example, the timing component may include a symbol location, and subframe index, and so on. associated with a subframe for SRS transmissions. For example, if the timing component is received on an uplink grant, a subframe index may correspond to a PUSCH transmission. Also, if the timing component is received on a downlink grant, a subframe index may correspond to a PUCCH transmission. In some aspects, the timing component, for example the bit or bits, may be included in a grant, for example an uplink grant when PUSCH transmissions are scheduled, a downlink grant when PUCCH transmissions are scheduled, etc.

In some aspects, the dynamic SRS configuration 400 illustrates an example of planning a joint transmission time for SRS transmissions and PUCCH transmissions. For example, SRS scheduling may include an SRS parameter (eg, the timing component associated with SRS transmissions) that collectively indicates the subframe index of where SRS transmissions occur and where PUCCH transmissions occur. Similarly, the SRS scheduling may include an SRS parameter that jointly indicates the subframe index of where the SRS transmission occurs and where the PUSCH transmissions occur.

In some aspects, a dynamic PUCCH configuration can be used to schedule a joint transmission time for PUCCH transmission and SRS transmission. For example, the PUCCH schedule may include a transmission time parameter that collectively represents the subframe index from where SRS transmissions occur and where PUSCH transmissions occur.

In some aspects, a dynamic PUSCH configuration can be used to schedule a joint transmission time for the PUSCH transmission and the SRS transmission. For example, the PUSCH schedule may include a transmission time parameter that collectively represents the subframe index at which SRS transmissions occur and at which PUSCH transmissions occur.

Subframe 1 may start with an SRS trigger 405 indicated on the PDCCH. The SRS trigger 405 may include a subframe index bit, for example, a first bit or bit 0. In some examples, the subframe index bit may transmit an indication of SRS transmission or transmissions, PUSCH transmission or transmissions. , transmission or transmissions of PUCCH or combinations thereof. In non-limiting example subframe 1, when the subframe index bit is "0", this may convey an indication that the SRS is transmitted in the current subframe and PUCCH is transmitted in the next subframe. Thus, in example subframe 1 the subframe index bit may be "0" and the trigger of SRS 405 may be followed by data transmitted over PDSCH and then transmission of SRS 410. That is, , SRS trigger 405 includes parameters for SRS transmission. Before the completion of subframe 1, an SRS 410 may be scheduled in response to the SRS 405 trigger. The SRS 410 may be scheduled in accordance with SRS transmission parameters indicated in the SRS 405 trigger, for example, by setting the SRS 405 trigger bit. subframe index to "0". Therefore, the SRS 405 trigger subframe index bit transmits a timing component that provides an indication of the schedule for the PUCCH 420 transmissions, and also the SRS 410 transmission for subframes 1-2.

Subframe 2 may start with an SRS trigger 415 indicated on the PDCCH. The SRS trigger 415 may also include a subframe index bit, for example, a second bit or 1 bit. In the non-limiting example subframe 2, when the subframe index bit is set to "1", this may transmit an indication that the SRS is transmitted in the next subframe (eg, subframe 3) and PUCCH is transmitted in the subframe that follows the next subframe indicating the transmission of SRS (eg, subframes 4). Therefore, the SRS 415 trigger subframe index bit can be set to "1" and the SRS 415 trigger can be followed by data transmitted over PDSCH and then the transmission of PUCCH 420 at the end of subframe 2. In the next subframe, subframe 3 may include a blank control portion 425 (eg, PDCCH without an SRS trigger), followed by data transmitted over PDSCH, and then the transmission of SRS 430 at the end of subframe 3. In the next subframe, subframe 4 may also include a blank control portion 435 (eg, PDCCH without an SRS trigger), followed by data transmitted over PDSCH, and then , the transmission of PUCCH 440 at the end of subframe 4. Therefore, the subframe index bit of the trigger of SRS 415 transmits a timing component that provides an indication of the schedule for the transmissions of PUCCH 440, and also In the transmission of SRS 430 for subframes 3-4.

Figure 5 illustrates an example of a process flow 500 for dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. Process flow 500 may include base station 105-b and UE 115-b, which may be examples of corresponding devices described with reference to Figure 1-2.

In some examples, in step 505, UE 115-b may optionally send UE feedback to base station 105-b. In step 510, base station 105-b can identify an SRS configuration for UE 115-b. The SRS configuration may be based on transmission parameters associated with the UE 115-b. The transmission parameters may include one or more than a channel condition parameter, a traffic type parameter, a data load indicator, and / or a communication channel parameter.

The SRS transmission parameters may include one or more than one timing component associated with SRS transmissions, a repetition parameter associated with SRS transmissions, a home position pointer associated with SRS transmissions, a occupied bandwidth associated with SRS transmissions, a symbol index value associated with SRS transmissions, a UE antenna port indication associated with SRS transmissions, a UE antenna subgrouping indication associated with SRS transmissions, a UE beam indication associated with SRS transmissions, a cyclic offset parameter associated with SRS transmissions, and / or a comb offset parameter associated with SRS transmissions.

In step 515, the base station 105-b may transmit an SRS grant message to the UE 115-b. The SRS grant message may include an SRS parameter indication associated with SRS transmissions from the UE 115-b. The SRS parameter indication may include the SRS parameters or, alternatively, it may include a location pointer to indicate where the SRS parameters are being signaled (for example, a location pointer to the PDSCH, where the PDSCH includes the parameters SRS transmission). In some cases, SRS parameters can be determined from UE feedback sent to base station 105-b in step 505. The SRS grant message can be sent on a control channel (eg, PDCCH). In some cases, the physical channel used by the UE 115-b for SRS transmissions can be determined based on whether the SRS grant message is received on a downlink grant or uplink grant. In step 520, UE 115-b may send SRS transmissions to base station 105-b in accordance with the SRS grant message in step 515.

Figure 18 illustrates an example of a process flow 1800 for dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. Process flow 1800 may include base station 105-g and UE 115-f, which may be examples of corresponding devices described with reference to Figure 1-2.

In step 1810, base station 105-g may transmit an SRS grant message to UE 115-f. The SRS grant message may include an SRS parameter indication associated with SRS transmissions from the UE 115-f. The SRS parameter indication may include the SRS parameters or, alternatively, it may include a location pointer to indicate where the SRS parameters are being signaled (for example, a location pointer to the PDSCH, where the PDSCH includes the parameters SRS transmission). In some cases, the SRS parameters can be determined from the UE feedback previously sent to the base station 105-g. The SRS grant message can be sent on a control channel (eg PDCCH).

The SRS grant message may be sent in a downlink control information (DCI) of a subframe. The DCI may include one or more bits associated with one or more parameters.

In one example, the DCI may indicate a number of uplink symbols for a PUCCH. In other examples, the DCI may indicate a number of uplink symbols for an SRS. The PUCCH or SRS can be transmitted at the end of a subframe, for example the subframe that included the DCI. In some examples, there may be different combinations of uplink symbols available for PUCCH and / or SRS, such that different numbers of DCI bits may indicate the combinations. For example, where three different combinations of symbols are possible (eg, zero, one or two symbols for PUCCH and / or SRS), two bits of DCI can be used to indicate the three different combinations.

In a second example, the DCI may indicate PUCCH scheduling (eg, for a downlink grant). The DCI may indicate a selected subframe to transmit the PUCCH. The number of DCI bits for PUCCH subframe indication may depend on the number of possible subframes in which the PUCCH can occur. For example, the PUCCH can occur in one of four different possible subframes, such that two DCI bits can be used to indicate the PUCCH scheduling. In other examples, the DCI may carry other information with reference to the PUCCH scheduling.

In a third example, the DCI may indicate SRS scheduling. A bit of the DCI can indicate whether or not the SRS is transmitted. The DCI may also carry one or more bits to indicate which symbol the SRS occupies. For example, the DCI may carry a bit to indicate that the SRS occupies one of two different symbol locations (eg, to indicate whether the SRS occupies the last symbol or the penultimate symbol of a subframe). In other examples, the DCI may carry one or more bits to indicate which subframe the SRS carries. The number of DCI bits for the indication of which subframe the SRS carries may depend on the number of possible subframes in which the SRS may occur. For example, two DCI bits can be used to indicate which or which four possible subframes carry SRS.

In step 1820, base station 105-g may transmit a DCI to UE 115-f. In some examples the SRS grant message may have been carried in a first DCI, and the DCI transmitted in step 1820 is a subsequent DCI. The downstream DCI may carry information regarding an SRS, a PUCCH, or both, which contradicts the information previously received by the UE 115-f with reference to the SRS, the PUCCH, or both. Such information can be included in the subsequent DCI according to one of the techniques described above with respect to step 1810.

In step 1830, after receiving the subsequent DCI in step 1820, the UE 115-f can identify that there is a contradiction between the information received in the SRS grant message in step 1810 and the DCI received in step 1820 , and resolve the contradiction identified between the SRS grant and the DCI.

In a first example to resolve the contradiction, the SRS grant may have been transmitted in a DCI of subframe N. The subframe may have indicated that UE 115-f was to transmit SRS in the penultimate symbol of a N + K subframe, where K> 2. After subframe N, for example, in subframe N + M, where 0 <M <K, a DCI bit field may indicate that the number of UL symbols assigned for PUCCH and / or SRS indicates that the subframe N + K has only one symbol assigned for SRS and / or PUCCH. As such, the UE 115-f may need to determine whether to follow the instructions in the earlier SRS grant in the initial DCI (in the N subframe), or to follow the bits in the later DCI (N + M subframe). In some configurations, the UE 115-f may determine to transmit an SRS message according to the indication of SRS parameters found in the initial DCI that includes the SRS grant message in step 1810, and ignore the information transmitted in the subsequent DCI. In some configurations, the UE 115-f may determine to ignore the SRS parameters found in the initial DCI, and transmit an SRS message in accordance with the SRS parameter indication according to the information transmitted in the subsequent DCI.

In a second example to resolve the contradiction in step 1830, the SRS grant may have been transmitted in a DCI of subframe N. The subframe may have indicated that the UE 115-f was to transmit SRS in the last symbol of a subframe. N + K, where K> 2. After subframe N, for example, in subframe N + M, where 0 <M <K, a bit field of the DCI related to the PUCCH scheduling in the DCI grant may indicate that the PUCCH should be transmitted in the last symbol of subframe N + K. In view of this contradiction, the UE 115-f may need to determine whether to follow the instructions in the earlier SRS grant in the initial DCI (in the N subframe), or to follow the bits in the later DCI (N + M subframe). In some configurations, the UE 115-f may determine to transmit an SRS message according to the indication of SRS parameters found in the initial DCI including the SRS grant message in step 1810, and ignore the information transmitted in the Posterior DCI. In some configurations, the UE 115-f may determine to ignore the indication of SRS parameters found in the initial DCI, and follow the PUCCH scheduling according to the information transmitted in the subsequent DCI. In other configurations, the UE 115-f may determine to ignore all information transmitted in the initial (first) DCI and ignore all information transmitted in the subsequent (second) DCI.

In each of the examples provided above to resolve an SRS and DCI grant message contradiction, the DCI may be received immediately after the SRS grant message (which may also be, for example, part of a previous or initial DCI) , or the DCI may be received a number of subframes later. Similarly, the SRS or PUCCH may be scheduled for the same subframe as the subsequent DCI, or it may be scheduled for subsequent subframes.

In step 1840, the transmission of SRS or PUCCH may occur. As described above, the transmission of an SRS or PUCCH transmission may depend on the UE 115-f which resolves a contradiction between the SRS grant message and a subsequently received DCI.

Figure 21 illustrates an example of a process flow 2100 for dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. Process flow 2100 may include base station 105-h and UE 115-g, which may be examples of corresponding devices described with reference to Figure 1-2.

In step 2110, the base station 105-h can transmit a DCI to the UE 115-g. In one example, the DCI may indicate a number of uplink symbols for a PUCCH. In other examples, the DCI may indicate a number of uplink symbols for an SRS. The PUCCH or SRS can be transmitted at the end of a subframe, for example the subframe that included the DCI. In some examples, there may be different combinations of uplink symbols available for PUCCH and / or SRS, such that different numbers of DCI bits may indicate the combinations. For example, where three different combinations of symbols are possible (eg, zero, one or two symbols for PUCCH and / or SRS), two bits of DCI can be used to indicate the three different combinations.

In a second example, the DCI may indicate PUCCH scheduling (eg, for a downlink grant). The DCI may indicate a selected subframe to transmit the PUCCH. The number of DCI bits for PUCCH subframe indication may depend on the number of possible subframes in which the PUCCH can occur. For example, the PUCCH can occur in one of four different possible subframes, such that two DCI bits can be used to indicate the PUCCH scheduling. In other examples, the DCI may carry other information with reference to the PUCCH scheduling.

In a third example, the DCI may indicate SRS scheduling. A bit of the DCI can indicate whether or not the SRS is transmitted. The DCI may also carry one or more bits to indicate which symbol the SRS occupies. For example, the DCI may carry a bit to indicate that the SRS occupies one of two different symbol locations (eg, to indicate whether the SRS occupies the last symbol or the penultimate symbol of a subframe). In other examples, the DCI may carry one or more bits to indicate which subframe the SRS carries. The number of DCI bits for the indication of which subframe the SRS carries may depend on the number of possible subframes in which the SRS may occur. For example, two DCI bits can be used to indicate which or which four possible subframes carry SRS.

The DCI may carry information regarding an SRS, a PUCCH, or both, which contradicts subsequent information received by the UE 115-g with reference to the SRS, the PUCCH, or both. Such information can be included in the above DCI according to one of the techniques described above with respect to step 2120.

In step 2120, the base station 105-h may transmit an SRS grant message to the UE 115-g. The SRS grant message may include an SRS parameter indication associated with SRS transmissions from base station 105-h. The SRS parameter indication may include the SRS parameters or, alternatively, it may include a location pointer to indicate where the SRS parameters are being signaled (eg, a location pointer to the PDSCH, where PDSCH includes the SRS transmission parameters). In some cases, the SRS parameters can be determined from the UE feedback previously sent to the base station 105-h. The SRS grant message can be sent on a control channel (eg PDCCH). The SRS grant message may be sent in a downlink control information (DCI) of a subframe. The DCI may include one or more bits associated with one or more parameters.

In step 2130, after receiving the subsequent SRS grant message in step 2120, the UE 115-g can identify that there is a contradiction between the information received in the SRS grant message in step 2120 and the received DCI in step 2110, and resolve the identified contradiction between the SRS grant and the DCI.

In a first example to resolve the contradiction, the DCI may have transmitted in subframe N. The subframe may have indicated that the UE 115-g was going to transmit the SRS in the penultimate symbol of an N + K subframe, where K> 2. After subframe N, for example, in subframe N + M, where 0 <M <K, an SRS grant in the subsequent DCI may indicate that the number of UL symbols allocated for PUCCH and / or SRS indicates that the N + K subframe has only one symbol assigned for SRS and / or PUCCH. As such, the UE 115-g may need to determine whether to follow the instructions in the initial DCI (in subframe N), or follow the bits in the SRS grant in the subsequent DCI (subframe N + M). In some configurations, the UE 115-g may determine to transmit an SRS transmission according to the indication of SRS parameters found in the initial DCI in step 2110, and ignore the information transmitted in the subsequent DCI that includes the grant message. by SRS. In some configurations, the UE 115-g may determine to ignore the SRS parameters found in the initial DCI, and transmit an SRS transmission in accordance with the SRS grant in the subsequent DCI.

In a second example to resolve the contradiction in step 2130, the DCI may have transmitted in a DCI of subframe N. The subframe may have indicated that the UE 115-g was going to transmit the SRS in the last symbol of a subframe N + K, where K> 2. After subframe N, for example, in subframe N + M, where 0 <M <K, an SRS grant in the downstream DCI related to PUCCH scheduling in the DCI may indicate that the PUCCH should be transmitted on the last symbol of the N + K subframe. In view of this contradiction, the UE 115-g may need to determine whether to follow the instructions in the previous DCI (in subframe N), or follow the bits in the SRS grant in the later DCI (subframe N + M). In some configurations, the UE 115-g may determine to transmit an SRS transmission according to the indication of SRS parameters found in the initial DCI in step 2110, and ignore the information transmitted in the SRS grant in the subsequent DCI. In some configurations, the UE 115-g may determine to ignore the initial DCI, and follow the PUCCH scheduling according to the information transmitted in the subsequent DCI. In other configurations, the UE 115-g may determine to ignore all information transmitted in the initial (first) DCI and ignore all information transmitted in the subsequent (second) DCI.

In each of the examples provided above to resolve an SRS and DCI grant message contradiction, the SRS grant message (which can also be, for example, part of a previous or initial DCI) can be received immediately after the DCI, or the SRS grant message may be received a number of subframes later. Similarly, the SRS or PUCCH can be scheduled for the same subframe as the previous DCI, or it can be scheduled for previous subframes.

In step 2140, the transmission of SRS or PUCCH may occur. As described above, the transmission of an SRS or PUCCH transmission may depend on the UE 115-g which resolves a contradiction between the SRS grant message and a subsequently received DCI.

Figure 22 illustrates an example of a process flow 2200 for dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. Process flow 2200 may include base station 105-i and UE 115-h, which may be examples of corresponding devices described with reference to Figure 1-2.

In step 2210, base station 105-i can transmit, in the same subframe, a first DCI and a second DCI to UE 115-h. The second DCI may contain an SRS grant message. The first DCI may be a DCI sent to UE 115 as described with reference to one or more of step 1820 of Figure 18 or step 2110 of Figure 21. The SRS grant message may be a grant message. of SRS sent to UE 115 as described with reference to one or more of step 1810 of Figure 18 or step 2120 of Figure 21. Information transmitted in the first DCI of the subframe may contradict the indication of parameters of SRS in the SRS grant message in the same subframe.

In step 2220, after receiving the subsequent SRS grant message in step 2120, the UE 115-h can identify that there is a contradiction between the information received in the SRS grant message and the first DCI received in step 2210, and resolve the contradiction identified between the SRS grant and the first DCI.

In some configurations, the UE 115-h may determine to transmit in accordance with the parameters found in the first DCI, and ignore the information transmitted in a second DCI that includes the SRS grant message.

In some configurations, the UE 115-h may determine to ignore the first DCI, and transmit an SRS transmission in accordance with the grant of s Rs in the second DCI. In some configurations, the UE 115-h may determine to transmit an SRS transmission according to the indication of SRS parameters found in the first DCI, and ignore the information transmitted in the SRS grant in the second DCI. In some configurations, the UE 115-h may determine to ignore the first DCI, and follow the PUCCH scheduling according to the information transmitted in the second DCI. In other configurations, the Ue 115-h may determine to ignore all information transmitted in the first DCI in the subframe and all information transmitted in a second DCI received in the same subframe.

In step 2230, the transmission of SRS or PUCCH may occur. As described above, the transmission of an SRS or PUCCH transmission may depend on the UE 115-h which resolves a contradiction between the SRS grant message and DCI in the same subframe.

Figure 6 shows a block diagram of a wireless device 600 that supports dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. The wireless device 600 may be an example of aspects of a base station 105 described with reference to Figures 1, 2, and 5. The wireless device 600 may include a receiver 605, an SRS manager 610, and a transmitter 615. The wireless device 600 may also include a processor. Each of these components can be in communication with each other.

Receiver 605 may receive information such as packets, user data, or control information associated with various information channels (eg, control channels, data channels, and information related to dynamic probe reference signal planning, etc.) . The information can be passed on to other components of the device. Receiver 605 may be an example of aspects of transceiver 925 described with reference to Figure 9.

The SRS manager 610 may identify an SRS configuration for a UE, transmit an SRS grant message to the UE, the SRS grant message basing on the SRS configuration for the UE and comprising an indication of SRS parameters, and receiving, from the UE, one or more SRS transmissions according to the SRS grant message. The SRS manager 610 may also be an example of aspects of the SRS manager 905 described with reference to Figure 9.

Transmitter 615 can transmit signals received from other components of wireless device 600. In some examples, transmitter 615 can be co-located with a receiver on a transceiver module. For example, transmitter 615 may be an example of aspects of transceiver 925 described with reference to Figure 9. Transmitter 615 may include a single antenna, or it may include a plurality of antennas.

Figure 7 shows a block diagram of a wireless device 700 that supports dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. The wireless device 700 may be an example of aspects of a wireless device 600 or a base station 105 described with reference to Figures 1, 2, 5, and 6. The wireless device 700 may include a receiver 705, an SRS manager 710, and a transmitter 730. Wireless device 700 may also include a processor. Each of these components can be in communication with each other.

Receiver 705 can receive information that can be passed on to other components of the device. Receiver 705 may also perform the functions described with reference to receiver 605 of Figure 6. Receiver 705 may be an example of aspects of transceiver 925 described with reference to Figure 9.

The SRS manager 710 may be an example of aspects of the SRS manager 610 described with reference to Figure 6. The SRS manager 710 may include an SRS 715 configuration component, an SRS 720 grant component, and an SRS 720 concession component. SRS 725. The SRS manager 710 may be an example of aspects of the SRS manager 905 described with reference to Figure 9.

The SRS configuration component 715 can identify an SRS configuration for a UE. The SRS grant component 720 may transmit an SRS grant message to the UE, the SRS grant message basing on the SRS configuration for the UE and comprising an indication of SRS parameters, and transmit the indication of the SRS parameters. SRS in the SRS grant message comprising a set of SRS transmission parameters associated with SRS transmissions from the UE. The SRS component 725 may receive, from the UE, one or more SRS transmissions in accordance with the SRS grant message. In some cases, the SRS grant message is transmitted on a control channel. In some cases, the control channel comprises a PDCCH. In some cases, the SRS parameters comprise one or more than one timing component associated with SRS transmissions, a repetition parameter associated with s Rs transmissions, a home position pointer associated with SRS transmissions, a busy bandwidth parameter associated with SRS transmissions, a symbol index value associated with SRS transmissions, a UE antenna port indication associated with SRS transmissions, a UE antenna subgrouping indication associated with SRS transmissions, a UE beam indication associated with SRS transmissions, a cyclic offset parameter associated with SRS transmissions, a comb offset parameter associated with SRS transmissions SRS or combinations thereof. In some cases, the SRS parameter comprises a timing component associated with SRS transmissions. The timing component may include a subframe symbol location associated with SRS transmissions. The timing component may include a subframe index associated with the subframe index. In some aspects, the timing component may include an uplink subframe index associated with a PUSCH transmission and may be received on an uplink grant. In some aspects, the timing component further comprises an uplink subframe index associated with a PUCCH transmission and may be received in a downlink grant.

In some cases, the SRS subframe index may come from the timing component of PUCCH or PUSCH. The PUCCH timing component, received in a DL grant, may include the subframe index associated with both the SRS and the PUCCH transmission. The PUSCH timing component, received in a UL grant, may include the subframe index associated with the SRS and the PUSCH transmission.

Transmitter 730 can transmit signals received from other components of wireless device 700. In some examples, transmitter 730 can be co-located with a receiver on a transceiver module. For example, transmitter 730 may be one example of aspects of transceiver 925 described with reference to Figure 9. Transmitter 730 may use a single antenna, or it may use a plurality of antennas.

Figure 8 shows a block diagram of an SRS 800 manager which may be an example of the corresponding component of the wireless device 600 or wireless device 700. That is, the SRS 800 manager may be an example of aspects of the SRS 610 manager. or SRS manager 710 described with reference to Figures 6 and 7. The SRS manager 800 may also be an example of aspects of the SRS manager 905 described with reference to Figure 9.

The SRS 800 manager may include an SRS grant component 805, a transmit parameters component 810, an SRS configuration component 815, an SRS component 820, and a location pointer component 825. Each of these modules it can communicate, directly or indirectly, with each other (for example, through one or more buses).

The SRS grant component 805 may transmit an SRS grant message to the UE, the SRS grant message basing on the SRS configuration for the UE and comprising an indication of SRS parameters, and transmit the indication of the SRS parameters. SRS in the SRS grant message comprising a set of SRS transmission parameters associated with SRS transmissions from the UE. In some cases, the SRS grant message is transmitted on a control channel.

The transmission parameter component 810 may identify the SRS configuration for the UE based on the transmission parameters. In some cases, identifying the SRS configuration for the UE comprises: identifying one or more transmission parameters associated with the UE. In some cases, the transmission parameters comprise one or more than a channel condition parameter, a traffic type parameter, a data load indicator, a communication channel parameter, or combinations thereof.

The SRS configuration component 815 can identify an SRS configuration for a UE. The SRS component 820 may receive, from the UE, one or more SRS transmissions in accordance with the SRS grant message.

The location pointer component 825 may generate a location pointer associated with a set of SRS transmission parameters associated with SRS transmissions from the UE. In some cases, the location pointer provides an indication of a shared data channel that comprises the SRS transmission parameter set. In some cases, the shared data channel comprises a PDSCH.

Figure 9 shows a diagram of a wireless system 900 that includes a device configured that supports dynamic probe reference signal scheduling in accordance with various aspects of the present disclosure. For example, the wireless system 900 may include a base station 105-c, which may be an example of a wireless device 600, a wireless device 700, or a base station 105 as described with reference to Figures 1, 2, and 5 a 7. Base station 105-c may also include components for two-way voice and data communications that include components for transmitting communications and components for receiving communications. For example, base station 105-c can communicate bi-directionally with one or more UEs, such as UE 115-c and / or 115-d.

Base station 105-c may also include SRS manager 905, memory 910, processor 920, transceiver 925, antenna 930, base station communications module 935, and communications module. network 940. Each of these modules can communicate, directly or indirectly, with each other (for example, through one or more buses).

The SRS manager 905 may be an example of an SRS manager as described with reference to Figures 6-8. The memory 910 may include random access memory (RAM) and read-only memory (ROM). Memory 910 can store computer-readable and executable software that includes instructions that, when executed, cause the processor to perform various functions described herein (eg, dynamic probe reference signal scheduling, etc.).

In some cases, the 915 software may not be directly executable by the processor, but may instead cause a computer (for example, when compiled and run) to perform functions described in this document. Processor 920 may include an intelligent hardware device, (eg, a central processing unit (CPU), microcontroller, application-specific integrated circuit (ASIC), etc.)

The transceiver 925 can communicate bi-directionally, via one or more antennas, wired or wireless links, with one or more networks, as described above. For example, the transceiver 925 may communicate bi-directionally with a base station 105 or a UE 115. The transceiver 925 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. antennas. In some cases, the wireless device may include a single antenna 930. However, in some cases, the device may have more than one antenna 930, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions.

Base station communications module 935 may manage communications with another base station 105, and may include a controller or scheduler to control communications with UEs 115 in cooperation with other base stations 105, such as base stations 105-d and / or 105. -and. For example, base station communications module 935 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or co-transmission. In some examples, the base station communications module 935 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communication between base stations 105.

The network communications module 940 can handle communications with the main network (eg, through one or more wired backhaul links). For example, the network communications module 940 can handle the transfer of communications data for client devices, such as one or more UE 115.

Figure 10 shows a flow chart illustrating a method 1000 for dynamic probing reference signal planning in accordance with various aspects of the present disclosure. Method operations 1000 can be implemented by a device such as a base station 105 or its components as described with reference to Figures 1, 2 and 5. For example, method operations 1000 can be performed by the SRS manager as follows. described in this document. In some examples, base station 105 may execute a set of codes to control functional elements of the device to perform the functions described below. Additionally or alternatively, base station 105 may perform aspects of the functions described below using special purpose hardware.

In block 1005, base station 105 may identify an SRS configuration for a UE as described with reference to Figures 2 to 5. In certain examples, operations in block 1005 can be performed by the SRS configuration component as described with reference to Figures 6 and 7.

In block 1010, base station 105 may transmit an SRS grant message to the UE, the SRS grant message basing on the SRS configuration for the UE and comprising an indication of SRS parameters as described with reference to Figures 2 to 5. In certain examples, the operations of block 1010 may be performed by the SRS grant component as described with reference to Figures 6 and 7.

At block 1015, base station 105 may receive, from the UE, one or more SRS transmissions in accordance with the SRS grant message as described with reference to Figures 2 to 5. In certain examples, the operations of block 1015 can be performed by the SRS component as described with reference to Figures 6 and 7.

Figure 11 shows a flow chart illustrating a method 1100 for dynamic probing reference signal planning in accordance with various aspects of the present disclosure. Method 1100 operations can be implemented by a device such as a base station 105 or its components as described with reference to Figures 1, 2, and 4. For example, method 1100 operations can be performed by the SRS manager as follows. described in this document. In some examples, base station 105 may execute a set of codes to control functional elements of the device to perform the functions described below. Additionally or alternatively, base station 105 may perform aspects of the functions described below using special purpose hardware.

At block 1105, base station 105 may identify an SRS configuration for a UE as described with reference to Figures 2-5. In certain examples, operations in block 1105 can be performed by the SRS configuration component as described with reference to Figures 6 and 7.

In block 1110, base station 105 may identify one or more transmission parameters associated with the UE as described with reference to Figures 2 to 5. In certain examples, operations in block 1110 may be performed by the parameter component transmission as described with reference to Figures 6 and 7.

At block 1115, the base station 105 may identify the SRS configuration for the UE based on the transmission parameters as described with reference to Figures 2 to 5. In certain examples, the operations of block 1115 may be performed by the transmission parameter component as described with reference to Figures 6 and 7.

In block 1120, base station 105 may transmit an SRS grant message to the UE, the SRS grant message basing on the SRS configuration for the UE and comprising an indication of SRS parameters as described with reference to Figures 2 to 5. In certain examples, the operations of block 1120 may be performed by the SRS grant component as described with reference to Figures 6 and 7.

At block 1125, the base station 105 may receive, from the UE, one or more SRS transmissions in accordance with the SRS grant message as described with reference to Figures 2 to 5. In certain examples, the operations of block 1125 can be performed by the SRS component as described with reference to Figures 6 and 7.

Figure 12 shows a block diagram of a wireless device 1200 supporting claims in accordance with various aspects of the present disclosure. Wireless device 1200 may be an example of aspects of a UE 115 described with reference to Figures 1 and 2. Wireless device 1200 may include a receiver 1205, a transmitter 1210, and a UE 1215 SRS manager. Wireless device 1200 it can also include a processor. Each of these components can be in communication with each other.

Receiver 1205 may receive information such as packets, user data, or control information associated with various information channels (eg, control channels, data channels, and claim-related information, etc.). The information can be passed on to other components of the device. Receiver 1205 may be an example of aspects of transceiver 1525 described with reference to Figure 15.

Transmitter 1210 can transmit signals received from other components of wireless device 1200. In some examples, transmitter 1210 can be co-located with a receiver on a transceiver module. For example, transmitter 1210 may be an example of aspects of transceiver 1525 described with reference to Figure 15. Transmitter 1210 may include a single antenna, or it may include a plurality of antennas.

The UE SRS manager 1215 may receive an SRS grant message from a base station, the SRS grant message based on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters, and transmit , to the base station, one or more SRS transmissions in accordance with the SRS grant message. The UE SRS manager 1215 may also be an example of aspects of the UE SRS manager 1505 described with reference to Figure 15.

Figure 13 shows a block diagram of a wireless device 1300 supporting claims in accordance with various aspects of the present disclosure. The wireless device 1300 may be an example of aspects of a wireless device 1200 or a UE 115 described with reference to Figures 1, 2 and 12. The wireless device 1300 may include a receiver 1305, a UE 1310 SRS manager, and a transmitter 1325. Wireless device 1300 may also include a processor. Each of these components can be in communication with each other.

Receiver 1305 can receive information that can be passed to other components of the device. Receiver 1305 may also perform the functions described with reference to receiver 1205 of Figure 12. Receiver 1305 may be an example of aspects of transceiver 1525 described with reference to Figure 15.

The UE 1310 SRS manager may be an example of aspects of the UE 1215 SRS manager described with reference to Figure 12. The UE 1310 SRS manager may include an SRS 1315 grant component and an SRS 1320 component. The UE SRS manager 1310 may be an example of aspects of the UE SRS manager 1505 described with reference to Figure 15.

The SRS grant component 1315 may receive an SRS grant message from a base station, the s Rs grant message basing on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters, and receiving the indication of the SRS parameters in the SRS grant message comprising a set of SRS transmission parameters associated with the SRS transmissions from the UE.

In some cases, the SRS grant message is received on a control channel. In some cases, the control channel comprises a physical downlink control channel (PDCCH). In some cases, the SRS parameters comprise one or more than one repetition parameter associated with SRS transmissions, a home position pointer associated with SRS transmissions, a busy bandwidth parameter associated with SRS transmissions. , a symbol index value associated with SRS transmissions, a UE antenna port indication associated with SRS transmissions, a UE antenna subgrouping indication associated with SRS transmissions, a UE beam indication associated with SRS transmissions, a cyclic offset parameter associated with SRS transmissions, a comb offset parameter associated with SRS transmissions, or combinations thereof.

In some cases, the identified SRS configuration for the UE comprises an identification of one or more transmission parameters associated with the UE, and an identification of the SRS configuration for the UE based on the transmission parameters. In some cases, the transmission parameters comprise one or more than a channel condition parameter, a traffic type parameter, a data load indicator, a communication channel parameter, or combinations thereof.

The SRS component 1320 may transmit, to the base station, one or more SRS transmissions in accordance with the SRS grant message. Transmitter 1325 can transmit signals received from other components of wireless device 1300. In some examples, transmitter 1325 can be co-located with a receiver on a transceiver module. For example, transmitter 1325 may be one example of aspects of transceiver 1525 described with reference to Figure 15. Transmitter 1325 may use a single antenna, or it may use a plurality of antennas.

Figure 14 shows a block diagram of a UE 1400 SRS manager which may be an example of the corresponding component of the wireless device 1200 or wireless device 1300. That is, the UE 1400 SRS manager may be an example of aspects of the UE 1215 SRS manager or UE 1310 SRS manager described with reference to Figures 12 and 13. The UE 1400 SRS manager may also be an example of aspects of the UE 1505 SRS manager described with reference to Figure 15.

The UE SRS manager 1400 may include an SRS grant component 1405, an SRS component 1410, a location pointer component 1415, and a timing component 1420. Each of these modules may communicate, directly or indirectly, between yes (for example, through one or more buses).

The SRS grant component 1405 may receive an SRS grant message from a base station, the SRS grant message based on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters, and receive the indication of the SRS parameters in the SRS grant message comprising a set of SRS transmission parameters associated with the SRS transmissions from the UE. The SRS component 1410 may transmit, to the base station, one or more SRS transmissions in accordance with the SRS grant message.

The location pointer component 1415 may identify a location pointer associated with a set of SRS transmission parameters associated with SRS transmissions from the UE. In some cases, the location pointer provides an indication of a shared data channel that comprises the SRS transmission parameter set. In some cases, the shared data channel comprises a downlink shared physical channel (PDSCH).

Timing component 1420 may enable SRS timing operations. In some cases, the timing component comprises a symbol location associated with a subframe for SRS transmissions. In some cases, the timing component comprises a subframe index associated with the SRS transmissions. In some cases, the timing component further comprises an uplink subframe index associated with an uplink shared physical channel (PUSCH) transmission. In some cases, the timing component is received on an uplink grant. In some cases, the timing component further comprises an uplink subframe index associated with an uplink control physical channel (PUCCH) transmission. In some cases, the timing component is received on a downlink grant.

Figure 15 shows a diagram of a system 1500 that includes a device supporting claims in accordance with various aspects of the present disclosure. For example, the system 1500 may include a UE 115-e, which may be an example of a wireless device 1200, a wireless device 1300, or a UE 115 as described with reference to Figures 1, 2, and 12-14.

The UE 115-e can also include a UE 1505 SRS manager, a memory 1510, a processor 1520, a transceiver 1525, an antenna 1530 and an ECC module 1535. Each of these modules can communicate, directly or indirectly, with each other (for example, via one or more buses). The UE SRS manager 1505 may be an example of a UE SRS manager as described with reference to Figures 12 through 14.

Memory 1510 may include random access memory (RAM) and read-only memory (ROM). Memory 1510 can store computer-readable and executable software that includes instructions that, when executed, cause the processor to perform various functions described herein (eg, claims, etc.). In some cases, the 1515 software may not be directly executable by the processor, but may instead cause a computer (for example, when compiled and run) to perform functions described in this document. Processor 1520 may include an intelligent hardware device, (for example, a central processing unit (CPU), a microcontroller, an application-specific integrated circuit (ASIC), etc.)

Transceiver 1525 can communicate bi-directionally, via one or more antennas, wired or wireless links, with one or more networks, as described above. For example, the transceiver 1525 may communicate bi-directionally with a base station 105 or a UE 115. The transceiver 1525 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. antennas. In some cases, the wireless device may include a single antenna 1530. However, in some cases, the device may have more than one antenna 1530, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions.

The ECC module 1535 can enable operations using enhanced component carriers (eCC) such as communication using unlicensed or shared spectrum, using reduced TTI or subframe durations, or using a large number of component carriers.

Figure 16 shows a flow chart illustrating a method 1600 for claims in accordance with various aspects of the present disclosure. Method 1600 operations can be implemented by a device such as a UE 115 or its components as described with reference to Figures 1 and 2. For example, method 1600 operations can be performed by the UE SRS manager as described. in this document. In some examples, the UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special purpose hardware.

At block 1605, the UE 115 may receive an SRS grant message from a base station, the SRS grant message based on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters as follows. has been described with reference to Figures 2 to 11. In certain examples, the operations of block 1605 may be performed by the SRS grant component as described with reference to Figures 13 and 14.

At block 1610, the UE 115 may transmit, to the base station, one or more SRS transmissions in accordance with the SRS grant message as described with reference to Figures 2 to 11. In certain examples, the operations of block 1610 can be performed by the SRS component as described with reference to Figures 13 and 14.

Figure 17 shows a flow chart illustrating a method 1700 for claims in accordance with various aspects of the present disclosure. Method 1700 operations can be implemented by a device such as a UE 115 or its components as described with reference to Figures 1 and 2. For example, method 1700 operations can be performed by the UE SRS manager as described. in this document. In some examples, the UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special purpose hardware.

At block 1705, the UE 115 may receive an SRS grant message from a base station, the SRS grant message based on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters as follows. described with reference to Figures 2 to 11. In some cases, the identified SRS configuration for the UE comprises an identification of one or more transmission parameters associated with the UE, and an identification of the SRS configuration for the UE based on in the transmission parameters. In some cases, the transmission parameters comprise one or more than a channel condition parameter, a traffic type parameter, a data load indicator, a communication channel parameter, or combinations thereof. In certain examples, the operations of block 1705 can be performed by the SRS grant component as described with reference to Figures 13 and 14.

At block 1710, the UE 115 may transmit, to the base station, one or more SRS transmissions in accordance with the SRS grant message as described with reference to Figures 2 to 11. In certain examples, the operations of block 1710 can be performed by the SRS component as described with reference to Figures 13 and 14.

Figure 19 shows a flow chart illustrating a method 1900 for claims in accordance with various aspects of the present disclosure. Method 1900 operations can be implemented by a device such as a UE 115 or its components as described with reference to Figures 1 and 2. For example, Method 1900 operations can be performed by the UE SRS manager as described in this document. In some examples, the UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special purpose hardware.

In block 1905, the UE 115 may receive an SRS grant message from a base station, the SRS grant message basing on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters as follows. described with reference to Figures 2-11 and 18. In certain examples, the operations of block 1905 may be performed by the SRS grant component as described with reference to Figures 13 and 14.

At block 1910, the UE 115 may receive a DCI in a first subframe after receiving the SRS grant message in a second subframe, where information transmitted in the DCI contradicts the indication of SRS parameters in the SRS grant message. SRS, as described with reference to Figures 2-11 and 18. In certain examples, the operations of block 1910 may be performed by the SRS component as described with reference to Figures 13 and 14. In some cases, the ordering of blocks 1905 and 1910 can be reversed.

In block 1915, the UE 115 may determine to ignore information transmitted in the DCI, as described with reference to Figures 2-11 and 18. In certain examples, the operations of block 1915 can be performed by the SRS component as follows. described with reference to Figures 13 and 14.

In block 1920, the UE 115 may transmit, to the base station, an SRS message in accordance with the SRS parameter indication as described with reference to Figures 2-11 and 18. In certain examples, the operations of block 1920 can be performed by the SRS component as described with reference to Figures 13 and 14.

Figure 20 shows a flow chart illustrating a method 2000 for claims in accordance with various aspects of the present disclosure. Method 2000 operations can be implemented by a device such as a UE 115 or its components as described with reference to Figures 1 and 2. For example, method 2000 operations can be performed by the UE SRS manager as described. in this document. In some examples, the UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special purpose hardware.

In block 2005, the UE 115 may receive an SRS grant message from a base station, the SRS grant message based on an identified SRS configuration, the SRS grant message comprising an indication of SRS parameters as follows. has been described with reference to Figures 2-11 and 18. In certain examples, block 2005 operations may be performed by the SRS grant component as described with reference to Figures 13 and 14.

At block 2010, the UE 115 may receive a DCI in a first subframe after receiving the SRS grant message in a second subframe, where information transmitted in the DCI contradicts the SRS parameter indication in the SRS grant message. SRS, as described with reference to Figures 2 to 11 and 18. In certain examples, the operations of the block 2010 can be performed by the SRS component as described with reference to Figures 13 and 14. In some cases, the ordering of the 2005 and 2010 blocks can be reversed.

In block 2015, the UE 115 may determine to ignore the SRS parameter indication, as described with reference to Figures 2-11 and 18. In certain examples, the operations of block 2015 can be performed by the SRS component as described with reference to Figures 13 and 14.

In block 2020, the UE 115 can transmit, to the base station, an SRS message in accordance with the information transmitted in the DCI, as described with reference to Figures 2 to 11 and 18. In certain examples, the Block 2020 operations can be performed by the SRS component as described with reference to Figures 13 and 14.

Figure 23 shows a flow chart illustrating a method 2300 for dynamic probing reference signal scheduling in accordance with various aspects of the present disclosure. Method 2300 operations can be implemented by a UE 115 or its components as described in this document. For example, method 2300 operations can be performed by the UE SRS manager as described in this document. In some examples, a UE 115 can execute a set of codes to control functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special purpose hardware.

At block 2305 the UE 115 may receive, in a UE, an SRS grant message from a base station based at least in part on a timing component, wherein the timing component is associated with a physical uplink transmission. . Block 2305 operations can be performed in accordance with the methods described with reference to Figures 1 and 2. In certain examples, aspects of block 2305 operations can be performed by the SRS grant component as described with reference to Figures 13 and 14.

At block 2310 the UE 115 may transmit, to the base station, one or more SRS transmissions in accordance with the SRS grant message. The operations of block 2310 can be performed in accordance with the methods described with reference to Figures 1 and 2. In certain examples, aspects of the operations of block 2310 can be performed by the SRS component as described with reference to Figures 13 and 14.

Figure 24 shows a flow chart illustrating a method 2400 for dynamic probing reference signal planning in accordance with various aspects of the present disclosure. Method 2400 operations can be implemented by a base station 105 or its components as described in this document. For example, method 2400 operations by a base station SRS manager as described in this document. In some examples, a base station 105 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, base station 105 may perform aspects of the functions described below using special purpose hardware.

At block 2405 the base station 105 may transmit an SRS grant message to a UE based at least in part on a timing component, where the timing component is associated with a physical uplink transmission. The operations of block 2405 may be performed in accordance with the methods described with reference to Figures 1 and 2. In certain examples, aspects of the operations of block 2405 may be performed by an SRS grant component as described herein.

At block 2410 the base station 105 may receive, from the UE, one or more SRS transmissions in accordance with the SRS grant message. Block 2410 operations can be performed in accordance with the methods described with reference to Figures 1 and 2. In certain examples, aspects of block 2410 operations can be performed by an SRS component as described herein.

It should be noted that these methods describe one possible implementation, and that the operations and steps can be rearranged or otherwise modified in such a way that other implementations are possible. In some examples, aspects of two or more of the methods may be combined. For example, aspects of each of the methods may include steps or aspects of the other methods, or other steps or techniques described herein. Therefore, aspects of the disclosure can provide dynamic probing reference signal scheduling.

The description in this document is provided to enable one of ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art and the generic principles defined herein may be applied to other variations without departing from the scope of the invention as defined by the appended claims.

The functions described in this document can be implemented in hardware, software run by a processor, firmware, or any combination thereof. If implemented in software run by a processor, the functions can be stored in or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the appended claims. For example, due to the nature of software, the functions described above can be implemented using software run by a processor, hardware, firmware, direct wiring, or combinations of any of these. Features that implement functions can also be physically located in various positions, including being distributed in such a way that portions of the functions are implemented in different physical locations. Also, as used herein, including in the claims, "or" as used in a list of items (eg, a list of items preceded by an expression such as "at least one of" or "one or more de ") indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (that is, A and B and C ).

Computer-readable media includes both non-transient computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one location to another. A non-transient storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transient computer-readable medium may comprise RAM, ROM, electrically erasable and programmable read-only memory (EEPROM), compact disk (CD) ROM, or other optical disk storage, disk storage magnetic or other magnetic storage devices, or any other non-transient medium that can be used to transport or store desired program code media in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.

Also, any connection is appropriately called a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Magnetic disc and optical disc, as used in this document, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disc, and Blu-ray disc where magnetic discs normally reproduce data magnetically, whereas optical discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

The techniques described in this document can be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, single carrier frequency division multiple access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system can implement radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. c Dm A2000 covers the IS-2000, IS-95 and IS-856 standards. IS-2000 versions 0 and A are commonly referred to as CDMA2000 IX, IX, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Speed Packet Data (HRPD), etc. UTRA includes broadband CDMA (WCDMA) and other variants of CDMA. A TDMA system can implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system can implement radio technology such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (Universal Mobile Telecommunications System (UMTS)). LTE and LTE Advanced (LTE-A) from 3GPP are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-a and GSM are described in documents from an organization called "3rd Generation Wireless Technologies Common Project" (3GPP). CDMA2000 and UMB are described in documents from an organization called "3rd Generation 2 Wireless Technologies Common Project" (3GPP2). The techniques described in this document can be used for the aforementioned radio systems and technologies as well as other radio systems and technologies. The description in this document, however, describes an LTE system for example purposes, and LTE terminology is used in much of the above description, although the techniques are applicable beyond LTE applications.

In LTE / LTE-A networks, including the networks described in this document, the term evolved Node B (eNB) can generally be used to describe base stations. The wireless communication system (s) described herein may include a heterogeneous LTE / LTE-A network in which different types of eNBs provide coverage for various geographic regions. For example, each eNB or base station can provide communication coverage for a macro cell, small cell, or other cell types. The term "cell" is a 3GPP term that can be used to describe a base station, a carrier or component carrier (CC) associated with a base station, or a coverage area (eg sector, etc.) of a carrier. or base station, depending on the context.

Base stations may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point (AP), a radio transceiver, a NodeB, eNodeB (eNB), Home Node B. , a home eNodeB, or some other suitable terminology. The geographic coverage area for a base station can be divided into sectors that make up only a portion of the coverage area. The wireless communication system (s) described herein may include base stations of different types (eg, macro cell or small cell base stations). The UEs described herein may be capable of communicating with various types of base stations and network equipment, including macro eNBs, small cell eNBs, relay base stations, and the like. There may be overlapping geographic coverage areas for different technologies. In some cases, different coverage areas can be associated with different communication technologies. In some cases, the coverage area for one communication technology may overlap with the coverage area associated with another technology. Different technologies can be associated with the same base station, or with different base stations.

A macro cell generally covers a relatively large geographical area (eg several kilometers in radius) and can allow unrestricted access by UEs with service subscriptions with the network provider. A small cell is a base station with lower power, compared to a macro cell, which can operate in the same or different frequency bands (eg authorized, unauthorized, etc.) as macro cells. Small cells can include pico cells, femto cells, and micro cells according to various examples. A pico cell, for example, can cover a small geographical area and can allow unrestricted access by UEs with service subscriptions with the network provider. A femto cell can also cover a small geographic area (for example, a household) and can provide restricted access by UEs that have an association with the femto cell (for example, UEs in a closed subscriber group (CSG), a few EU for home users and the like). An eNB for a macro cell can be called a macro eNB. An eNB for a small cell can be referred to as a small cell eNB, a spike eNB, a femto eNB, or a household eNB. An eNB can support one or multiple (eg, two, three, four, and the like) cells (eg, component carriers (CC)). A UE may be capable of communicating with various types of base stations and network equipment including macro eNBs, small cell eNBs, relay base stations, and the like.

The wireless communication system or systems described in this document can support synchronous or asynchronous operation. For synchronous operation, the base stations can have similar frame timing, and the transmissions from different base stations can be roughly aligned in time. For asynchronous operation, the base stations may have different frame timing, and the transmissions from different base stations may not be time aligned. The techniques described in this document can be used for either synchronous or asynchronous operations.

The DL transmissions described in this document can also be called forward link transmissions while UL transmissions can also be called reverse link transmissions. Each communication link described in this document including, for example, the wireless communication system 100 and 200 of Figures 1 and 2 may include one or more carriers, where each carrier may be a signal composed of multiple subcarriers (e.g., waveform signals of different frequencies). Each modulated signal can be sent on a different subcarrier and can carry control information (eg, reference signals, control channels, etc.), overload information, user data, etc. The communication links described in this document (for example, the communication links 125 of Figure 1) can transmit bi-directional communications using a frequency division duplex (FDD) operation (for example, using paired spectrum resources) or full duplex. time division (TDD) (for example, using unpaired spectrum resources). Frame structures can be defined for FDD (for example, frame structure type 1) and TDD (for example, frame structure type 2).

Therefore, aspects of the disclosure can provide dynamic probing reference signal scheduling. It should be noted that these methods describe possible implementations, and that the operations and steps can be rearranged or otherwise modified in such a way that other implementations are possible. In some examples, aspects of two or more of the methods may be combined.

The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or realized with a general purpose processor, digital signal processor (DSP), ASIC, field programmable gate array (FPGA), or other. programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this document. A general purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices (eg, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration). Therefore, the functions described in this document can be carried out by one or more other processing units (or cores), in at least one integrated circuit (IC). In various examples, different types of ICs may be used (eg, structured / platform ASICs, an FPGA, or other semi-custom ICs), which may be programmed in any manner known in the art. The functions of each unit can also be implemented, in whole or in part, with instructions embedded in a memory, formatted to be executed by one or more general or application-specific processors.

In the accompanying figures, similar components or features may have the same reference label. Furthermore, various components of the same type can be distinguished by a hyphen and a second label following the reference label that distinguishes between similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label regardless of the second reference label.

Claims (15)

1. A method of wireless communication, comprising: receiving (2305), at a user equipment, UE, a polling reference signal grant message, SRS, from a base station, the SRS grant message comprising an indication of SRS parameters including a timing component and a repetition parameter associated with one or more SRS transmissions, wherein the timing component is associated with a physical uplink transmission; Y transmit (2310), to the base station, the one or more SRS transmissions in accordance with the SRS grant message. The method of claim 1, wherein the SRS grant message is based at least in part on an identified SRS configuration. The method of claim 1, further comprising: determining that the SRS grant message is received on an uplink grant; and selecting a physical channel based at least in part on the determination; Y transmitting the one or more SRS transmissions based at least in part on the SRS grant message and the selected physical channel. The method of claim 1, wherein the timing component comprises a symbol location associated with a subframe for the one or more SRS transmissions. The method of claim 1, wherein the timing component comprises a subframe index associated with the uplink physical channel transmission. The method of claim 5, wherein the subframe index comprises an uplink subframe index associated with an uplink shared physical channel transmission, PUSCH. The method of claim 6, wherein the timing component is received on an uplink grant. The method of claim 5, wherein the subframe index comprises an uplink subframe index associated with an uplink control physical channel transmission, PUCCH. The method of claim 1, wherein the SRS parameters comprise one or more of a home position pointer associated with the one or more SRS transmissions, a busy bandwidth parameter associated with the one or more transmissions of SRS, a symbol index value associated with the one or more SRS transmissions, a UE antenna port indication associated with the one or more SRS transmissions, a UE antenna subgrouping indication associated with the one or more plus SRS transmissions, a UE beam indication associated with the one or more SRS transmissions, a cyclic offset parameter associated with the one or more SRS transmissions, a comb offset parameter associated with the one or more SRS transmissions, SRS or combinations thereof. 10. A method of wireless communication, comprising: transmit (2405) a polling reference signal grant message, SRS, to a user equipment, UE, the SRS grant message comprising an indication of SRS parameters including a timing component and an associated repeat parameter with one or more SRS transmissions, wherein the timing component is associated with a physical uplink transmission; Y receiving (2410), from the UE, the one or more SRS transmissions according to the SRS grant message. The method of claim 10, further comprising: identifying an SRS configuration for the UE, wherein the SRS grant message is transmitted based at least in part on the SRS configuration. The method of claim 10, wherein the SRS parameters comprise one or more of a home position pointer associated with the one or more SRS transmissions, a busy bandwidth parameter associated with the one or more transmissions. of SRS, a symbol index value associated with the one or more SRS transmissions, a UE antenna port indication associated with the one or more SRS transmissions, a UE antenna subgrouping indication associated with the one or more plus SRS transmissions, a UE beam indication associated with the one or more SRS transmissions, a cyclic offset parameter associated with the one or more SRS transmissions, a comb offset parameter associated with the one or more SRS transmissions, SRS or combinations thereof. 13. An apparatus for wireless communication, comprising: means for receiving, at a user equipment, UE, a polling reference signal grant message, SRS, from a base station, the SRS grant message comprising an indication of SRS parameters including a timing component and a repetition parameter associated with one or more SRS transmissions, wherein the timing component is associated with a physical uplink transmission; Y means for transmitting, to the base station, the one or more SRS transmissions in accordance with the SRS grant message. 14. An apparatus for wireless communication, comprising: means for transmitting a polling reference signal grant message, SRS, to a user equipment, UE, the SRS grant message comprising an indication of SRS parameters including a timing component and a repetition parameter associated with one or more SRS transmissions, wherein the timing component is associated with a physical uplink; Y means for receiving, from the UE, the one or more SRS transmissions in accordance with the SRS grant message. 15. A computer program product, comprising: a computer-readable medium, comprising program code that causes a computer to perform a method according to any of claims 1 to 9 or 10 to 12 when executed.